- Open Settings > Apps > Manage Installed App > Choose your frequently used app and then select Force Stop.
- Go to Settings > Display and Sounds > Audio > Surround Sound > Turn off Dolby Digital Audio.
- Open Settings > My Fire TV > Reset to Factory Defaults.
Basic Fixes
- Downgrade streaming quality: You can start by reducing the streaming quality of whichever platform you are facing issues with.
- Connect Fire TV Stick to a 5GHz Wi-Fi Network: If you have a dual-band router, connect to a 5GHz frequency band for better internet speeds to watch 4K Ultra content .
- Connect Fire TV Stick via Ethernet Cable: An Ethernet Cable can significantly improve internet connectivity issues on your TV. Plug it if you can extend the same.
- Disable VPN: Using VPN can sometimes lead to content playback issues on your Fire TV Stick.
- Check Fire TV Stick storage: Believe it or not, storage issues can lead to buffering on your Fire TV Stick.
- Update apps and Fire OS version: Install the latest versions of both to ensure that there are no bugs or glitches.
Fix 1: Turn Off Background Apps and Services
Your Fire TV Stick keeps freezing and lagging when other services consume internet bandwidth in the background. You should force stop such apps and try playing your favorite videos again.
Step 1: Go to Fire TV Stick Settings and then open Applications .
Step 2: Select Manage Installed Applications .

Step 3: Open your frequently used app .
Step 4: Select Force stop .

Fix 2: Disable Dolby Audio on Fire TV Stick
Disable Dolby Audio on your Fire TV Stick. It might be possible that the streaming title doesn’t support the audio standard.
Go to Settings > Display and Sounds > Audio > Surround Sound > Turn off Dolby Digital Audio .

Fix 3: Clear Cache and Data
Most Fire TV Stick apps collect cache to remember your account info, search queries, and other details. A corrupt cache on a specific app may lead to buffering issues. You can clear the cache and data of an affected app and try again.
Step 1: Head to Fire TV Stick Settings .
Step 2: Go to Applications > Manage Installed Applications menu.

Step 3: Select your preferred app .

Step 4: Click Clear data and Clear cache .

Fix 4: Factory Reset
This extreme measure should only be used when none of the tweaks work. Follow the steps below to Factory Reset Fire TV Stick .
Step 1: Go to Settings > My Fire TV menu from the home screen.
Step 2: Scroll down and then select Reset to Factory Defaults .

Step 3 : Select Reset to confirm.
The action reverts your Firestick to how it was when it first left the factory. It deletes all your apps and files.